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36 lines
1.0 KiB
Markdown
36 lines
1.0 KiB
Markdown
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There are some switches in Arthas that can be viewed with the `options`{{execute T2}} command.
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View the value of a single option, such as
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`options unsafe`{{execute T2}}
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## Allow to enhance the classes of JDK
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By default, `unsafe` is false, ie commands such as `watch`/`trace` do not enhance the JVM class, which is the class starting with `java.*`.
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To enhance the classes in the JVM, execute `options unsafe true`{{execute T2}} to set `unsafe` to true.
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## Print objects in JSON format
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When `json-format` is false, the output is:
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```bash
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$ ognl '#value1=@System@getProperty("java.home"), #value2=@System@getProperty("java.runtime.name"), {#value1, #value2}'
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@ArrayList[
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@String[/usr/lib/jvm/java-8-oracle/jre],
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@String[Java(TM) SE Runtime Environment],
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]
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```
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`options json-format true`{{execute T2}}
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When `json-format` is true, the output is:
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```bash
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$ ognl '#value1=@System@getProperty("java.home"), #value2=@System@getProperty("java.runtime.name"), {#v["/usr/lib/jvm/java-8-oracle/jre","Java(TM) SE Runtime Environment"]
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```
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